package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {

    @Value("${reggie.path}")
    private String bassPath;



    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){

        log.info(file.toString());

        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        String fileName = UUID.randomUUID().toString()+suffix  ;

        //目录对象
        File dir = new File(bassPath);
        //是否存在
        if (!dir.exists()){
            dir.mkdirs();
        }

        try {
            file.transferTo(new File(bassPath+fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(fileName);
    }
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
        try {
            FileInputStream fileInputStream = new FileInputStream(new File(bassPath+name));
            ServletOutputStream outputStream = response.getOutputStream();

            response.setContentType("image/jpeg");

            int len = 0;
            byte[] bytes = new byte[1024];
        while ( (len = fileInputStream.read(bytes))!=-1){
                   outputStream.write(bytes,0,len);
                   outputStream.flush();
        }
        outputStream.close();
        fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
